125-200cc 130 too big for the rear tire? 130 M12 vs. 110 MX51 for ECEA races?

hi guys,

I ordered a 110 M12 for the rear, but Motosport sent me a 130.

I'm a C enduro racer on a WR150 which is becoming a WR165 this weekend in time for the race next weekend.

I'm in the ECEA series, so we have two rock runs and two sand runs left in the season.

Any reason I shouldn't just run this tire? I don't really know what negative effect the added width will have, but shipping it back will be a pain.

The other rear tire I have available is a 110 MX51. ECEA types, would that be better for the rest of the season?

thanks,
Dan

should fit,But it will rob power and a little bit of handling.
mx51 rear is a great tire,except you will probly only get 2 races out of it.

I had a 120 S12 on the rear of my 125, was good for sand. 130 seems too big.

http://www.michelinmotorcycle.com/index.cfm?event=M12XC

Here's what michelin says about their sizing. In short: your 130 is a 110.

long_stroke is right,I didn't realize it was a michelin. 130=110

Wow, crazy. Thanks for the info dudes, I never would have guessed that was the answer. CH for the win again.